DIY Servo Service

It's worky! Testing out Mats new DIY Servo service. This uses a 3D set of printed gears, a 12V DC motor, an LN298N dual hbridge motor controller and a 10k ohm linear trim rotary potentiometer. Woohoo, the power of PID controls you! The power of PID controls you!

I'm afraid the Shaft gear v2 appears like a sinking ship in Meshmixer and won't print correctly.
The plane of one half of the top of the gear is just above the zero horizon, and the other half submerged.
Slic3r get very confused...

I sliced and printed both without any complaints from Repetier / Cura.

I don't think Gael is using this construction for the knee. This is more a proof of concept than a final construction. So I think he will use the concept of a motor and a potentiometer, but the mechanical construction will be different.

But it's not 100% finished yet. You can run it at full speed, and control the PID parameters to make it run at different speeds. But I also want to implement the new speed and acceleration parameters. I think they should control the input to the PID. I'm currently printing the DiyServo parts that kwatters provided, so that I can test with a full scale DiyServo.

And you should be able to use it the same way as you do with a normal RC servo, but with real position feeback and more control over the different parameters.

This is great coz I was "working" :0) on an electronic sys to manage speed and direction on the same engine it was not easy and expensiveHttps://www.youtube.com/watch?v=gDysRy8l_CIA big thank-you. an thanks to reply so fast.

Why 0> 180° and not 0> 360° ?
I would have liked that the trunk turns (the hands, the head) to 360° like some others bots (see Shaft or Hubo). It would be really very practical and will save a lot of movement for/of the bot (walk to turn around, keep its balance etc). With "normal" engines it is possible.
In fact it would be great also to be able to control the movements of the bots by hand or with a potentiometer, opto or else, as do Poppy, Nao and others small bots.
Ex: I choose a place for the hand i record the position, with MRL, i place my hand at another place i record the position, etc.
MRL registers/mémorizes and creates a path. All by hand no need code, that's the difference with your function "gesture". The children would be very happy because very easy, funny, customizable for everyone, but especially easy to use. That's the goal, is not it ? Otherwise it will be a bot, like the mutlitude of others bots for specialists.
Friendly and thanks for your hard work.
Sy.

The 0-180 is just the default range to be compatible with the range we normally use for RC servos. You can reconfigure it to use the 0-360 range if that is what you prefer. It's just a question of how you mount the potentiometer.

And you should also be able to control the servo using any sensor. The potentiometer on the servo is there to provide feedback. But you can add one more potentiometer to change the position manually. So many possibilities :)

I am very excited to see this "service" finished ... I started to build legs for InMoov, I have the engines finally solid, elastic, springs, my daughter is ready to leap with her small screwdriver, An atomic submarine is near the coast ready to send reinforcements we evacuated the city of Paris.: 0) We are all ready to move us legs by hand and memorize everything in angles, centimeters, feet, inches, gallons, with MRL You can imagine the time to win with this DIY-servo service ... Pfiuuuu...

In the current state is it possible to memorize in MRL positions that I will choose myself ?(With MRL or an external potentiometer)I have built legs for InMoov but Schaft or Hubo type easier to balance ..

But for the moment I am incapable of having other disturbing tremors followed by some strained leg stiffening style horror movie: 0).So if we can use service DIY servo service.Can you help me to start well by sharing or a method or code. I will finally walk these legs and will of course share my results. If you have time of course.FriendlySy.